programs/wineboot/shutdown.c

   1 /*
   2  * Copyright (C) 2006 Alexandre Julliard
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include <stdarg.h>
  20 #include <stdlib.h>
  21
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "winuser.h"
  25 #include "tlhelp32.h"
  26
  27 #include "wine/debug.h"
  28
  29 #include "resource.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(wineboot);
  32
  33 #define MESSAGE_TIMEOUT     5000
  34
  35 struct window_info
  36 {
  37     HWND  hwnd;
  38     DWORD pid;
  39     DWORD tid;
  40 };
  41
  42 static UINT win_count;
  43 static UINT win_max;
  44 static struct window_info *windows;
  45 static DWORD desktop_pid;
  46
  47 /* store a new window; callback for EnumWindows */
  48 static BOOL CALLBACK enum_proc( HWND hwnd, LPARAM lp )
  49 {
  50     if (win_count >= win_max)
  51     {
  52         UINT new_count = win_max * 2;
  53         struct window_info *new_win = HeapReAlloc( GetProcessHeap(), 0, windows,
  54                                                    new_count * sizeof(windows[0]) );
  55         if (!new_win) return FALSE;
  56         windows = new_win;
  57         win_max = new_count;
  58     }
  59     windows[win_count].hwnd = hwnd;
  60     windows[win_count].tid = GetWindowThreadProcessId( hwnd, &windows[win_count].pid );
  61     win_count++;
  62     return TRUE;
  63 }
  64
  65 /* compare two window info structures; callback for qsort */
  66 static int cmp_window( const void *ptr1, const void *ptr2 )
  67 {
  68     const struct window_info *info1 = ptr1;
  69     const struct window_info *info2 = ptr2;
  70     int ret = info1->pid - info2->pid;
  71     if (!ret) ret = info1->tid - info2->tid;
  72     return ret;
  73 }
  74
  75 /* build the list of all windows (FIXME: handle multiple desktops) */
  76 static BOOL get_all_windows(void)
  77 {
  78     win_count = 0;
  79     win_max = 16;
  80     windows = HeapAlloc( GetProcessHeap(), 0, win_max * sizeof(windows[0]) );
  81     if (!windows) return FALSE;
  82     if (!EnumWindows( enum_proc, 0 )) return FALSE;
  83     /* sort windows by processes */
  84     qsort( windows, win_count, sizeof(windows[0]), cmp_window );
  85     return TRUE;
  86 }
  87
  88 struct callback_data
  89 {
  90     UINT window_count;
  91     BOOL timed_out;
  92     LRESULT result;
  93 };
  94
  95 static void CALLBACK end_session_message_callback( HWND hwnd, UINT msg, ULONG_PTR data, LRESULT lresult )
  96 {
  97     struct callback_data *cb_data = (struct callback_data *)data;
  98
  99     WINE_TRACE( "received response %s hwnd %p lresult %ld\n",
 100                 msg == WM_QUERYENDSESSION ? "WM_QUERYENDSESSION" : (msg == WM_ENDSESSION ? "WM_ENDSESSION" : "Unknown"),
 101                 hwnd, lresult );
 102
 103     /* If the window was destroyed while the message was in its queue, SendMessageCallback()
 104        calls us with a default 0 result.  Ignore it. */
 105     if (!lresult && !IsWindow( hwnd ))
 106     {
 107         WINE_TRACE( "window was destroyed; ignoring FALSE lresult\n" );
 108         lresult = TRUE;
 109     }
 110
 111     /* we only care if a WM_QUERYENDSESSION response is FALSE */
 112     cb_data->result = cb_data->result && lresult;
 113
 114     /* cheap way of ref-counting callback_data whilst freeing memory at correct
 115      * time */
 116     if (!(cb_data->window_count--) && cb_data->timed_out)
 117         HeapFree( GetProcessHeap(), 0, cb_data );
 118 }
 119
 120 struct endtask_dlg_data
 121 {
 122     struct window_info *win;
 123     BOOL cancelled;
 124     BOOL terminated;
 125 };
 126
 127 static INT_PTR CALLBACK endtask_dlg_proc( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam )
 128 {
 129     struct endtask_dlg_data *data;
 130     HANDLE handle;
 131
 132     switch (msg)
 133     {
 134     case WM_INITDIALOG:
 135         SetWindowLongPtrW( hwnd, DWLP_USER, lparam );
 136         ShowWindow( hwnd, SW_SHOWNORMAL );
 137         return TRUE;
 138     case WM_COMMAND:
 139         data = (struct endtask_dlg_data *)GetWindowLongPtrW( hwnd, DWLP_USER );
 140         switch (wparam)
 141         {
 142         case MAKEWPARAM(IDOK, BN_CLICKED):
 143             handle = OpenProcess( PROCESS_TERMINATE, FALSE, data->win[0].pid );
 144             if (handle)
 145             {
 146                 WINE_TRACE( "terminating process %04x\n", data->win[0].pid );
 147                 TerminateProcess( handle, 0 );
 148                 CloseHandle( handle );
 149                 data->terminated = TRUE;
 150             }
 151             return TRUE;
 152         case MAKEWPARAM(IDCANCEL, BN_CLICKED):
 153             data->cancelled = TRUE;
 154             return TRUE;
 155         }
 156         break;
 157     }
 158     return FALSE;
 159 }
 160
 161 /* Sends a message to a set of windows, displaying a dialog if the window
 162  * doesn't respond to the message within a set amount of time.
 163  * If the process has already been terminated, the function returns -1.
 164  * If the user or application cancels the process, the function returns 0.
 165  * Otherwise the function returns 0. */
 166 static LRESULT send_messages_with_timeout_dialog(
 167     struct window_info *win, UINT count, HANDLE process_handle,
 168     UINT msg, WPARAM wparam, LPARAM lparam )
 169 {
 170     unsigned int i;
 171     DWORD ret;
 172     DWORD start_time;
 173     struct callback_data *cb_data;
 174     HWND hwnd_endtask = NULL;
 175     struct endtask_dlg_data dlg_data;
 176     LRESULT result;
 177
 178     cb_data = HeapAlloc( GetProcessHeap(), 0, sizeof(*cb_data) );
 179     if (!cb_data)
 180         return 1;
 181
 182     cb_data->result = TRUE; /* we only care if a WM_QUERYENDSESSION response is FALSE */
 183     cb_data->timed_out = FALSE;
 184     cb_data->window_count = count;
 185
 186     dlg_data.win = win;
 187     dlg_data.terminated = FALSE;
 188     dlg_data.cancelled = FALSE;
 189
 190     for (i = 0; i < count; i++)
 191     {
 192         if (!SendMessageCallbackW( win[i].hwnd, msg, wparam, lparam,
 193                                    end_session_message_callback, (ULONG_PTR)cb_data ))
 194             cb_data->window_count --;
 195     }
 196
 197     start_time = GetTickCount();
 198     while (TRUE)
 199     {
 200         DWORD current_time = GetTickCount();
 201
 202         ret = MsgWaitForMultipleObjects( 1, &process_handle, FALSE,
 203                                          MESSAGE_TIMEOUT - (current_time - start_time),
 204                                          QS_ALLINPUT );
 205         if (ret == WAIT_OBJECT_0) /* process exited */
 206         {
 207             HeapFree( GetProcessHeap(), 0, cb_data );
 208             result = 1;
 209             goto cleanup;
 210         }
 211         else if (ret == WAIT_OBJECT_0 + 1) /* window message */
 212         {
 213             MSG msg;
 214             while(PeekMessageW( &msg, NULL, 0, 0, PM_REMOVE ))
 215             {
 216                 if (!hwnd_endtask || !IsDialogMessageW( hwnd_endtask, &msg ))
 217                 {
 218                     TranslateMessage( &msg );
 219                     DispatchMessageW( &msg );
 220                 }
 221             }
 222             if (!cb_data->window_count)
 223             {
 224                 result = dlg_data.terminated || cb_data->result;
 225                 HeapFree( GetProcessHeap(), 0, cb_data );
 226                 if (!result)
 227                     goto cleanup;
 228                 break;
 229             }
 230             if (dlg_data.cancelled)
 231             {
 232                 cb_data->timed_out = TRUE;
 233                 result = 0;
 234                 goto cleanup;
 235             }
 236         }
 237         else if ((ret == WAIT_TIMEOUT) && !hwnd_endtask)
 238         {
 239             hwnd_endtask = CreateDialogParamW( GetModuleHandleW(NULL),
 240                                                MAKEINTRESOURCEW(IDD_ENDTASK),
 241                                                NULL, endtask_dlg_proc,
 242                                                (LPARAM)&dlg_data );
 243         }
 244         else break;
 245     }
 246
 247     result = 1;
 248
 249 cleanup:
 250     if (hwnd_endtask) DestroyWindow( hwnd_endtask );
 251     return result;
 252 }
 253
 254 /* send WM_QUERYENDSESSION and WM_ENDSESSION to all windows of a given process */
 255 static DWORD_PTR send_end_session_messages( struct window_info *win, UINT count, UINT flags )
 256 {
 257     LRESULT result, end_session;
 258     HANDLE process_handle;
 259     DWORD ret;
 260
 261     /* FIXME: Use flags to implement EWX_FORCEIFHUNG! */
 262     /* don't kill the desktop process */
 263     if (win[0].pid == desktop_pid) return 1;
 264
 265     process_handle = OpenProcess( SYNCHRONIZE, FALSE, win[0].pid );
 266     if (!process_handle)
 267         return 1;
 268
 269     end_session = send_messages_with_timeout_dialog( win, count, process_handle,
 270                                                      WM_QUERYENDSESSION, 0, 0 );
 271     if (end_session == -1)
 272     {
 273         CloseHandle( process_handle );
 274         return 1;
 275     }
 276
 277     result = send_messages_with_timeout_dialog( win, count, process_handle,
 278                                                 WM_ENDSESSION, end_session, 0 );
 279     if (end_session == 0)
 280     {
 281         CloseHandle( process_handle );
 282         return 0;
 283     }
 284     if (result == -1)
 285     {
 286         CloseHandle( process_handle );
 287         return 1;
 288     }
 289
 290     /* Check whether the app quit on its own */
 291     ret = WaitForSingleObject( process_handle, 0 );
 292     CloseHandle( process_handle );
 293     if (ret == WAIT_TIMEOUT)
 294     {
 295         /* If not, it returned from all WM_ENDSESSION and is finished cleaning
 296          * up, so we can safely kill the process. */
 297         HANDLE handle = OpenProcess( PROCESS_TERMINATE, FALSE, win[0].pid );
 298         if (handle)
 299         {
 300             WINE_TRACE( "terminating process %04x\n", win[0].pid );
 301             TerminateProcess( handle, 0 );
 302             CloseHandle( handle );
 303         }
 304     }
 305     return 1;
 306 }
 307
 308 /* close all top-level windows and terminate processes cleanly */
 309 BOOL shutdown_close_windows( BOOL force )
 310 {
 311     UINT send_flags = force ? SMTO_ABORTIFHUNG : SMTO_NORMAL;
 312     DWORD_PTR result = 1;
 313     UINT i, n;
 314
 315     if (!get_all_windows()) return FALSE;
 316
 317     GetWindowThreadProcessId( GetDesktopWindow(), &desktop_pid );
 318
 319     for (i = n = 0; result && i < win_count; i++, n++)
 320     {
 321         if (n && windows[i-1].pid != windows[i].pid)
 322         {
 323             result = send_end_session_messages( windows + i - n, n, send_flags );
 324             n = 0;
 325         }
 326     }
 327     if (n && result)
 328         result = send_end_session_messages( windows + win_count - n, n, send_flags );
 329
 330     HeapFree( GetProcessHeap(), 0, windows );
 331
 332     return (result != 0);
 333 }
 334
 335 static BOOL CALLBACK shutdown_one_desktop( LPWSTR name, LPARAM force )
 336 {
 337     HDESK hdesk;
 338
 339     WINE_TRACE("Shutting down desktop %s\n", wine_dbgstr_w(name));
 340
 341     hdesk = OpenDesktopW( name, 0, FALSE, GENERIC_ALL );
 342     if (hdesk == NULL)
 343     {
 344         WINE_ERR("Cannot open desktop %s, err=%i\n", wine_dbgstr_w(name), GetLastError());
 345         return FALSE;
 346     }
 347
 348     if (!SetThreadDesktop( hdesk ))
 349     {
 350         CloseDesktop( hdesk );
 351         WINE_ERR("Cannot set thread desktop %s, err=%i\n", wine_dbgstr_w(name), GetLastError());
 352         return FALSE;
 353     }
 354
 355     CloseDesktop( hdesk );
 356
 357     return shutdown_close_windows( force );
 358 }
 359
 360 BOOL shutdown_all_desktops( BOOL force )
 361 {
 362     BOOL ret;
 363     HDESK prev_desktop;
 364
 365     prev_desktop = GetThreadDesktop(GetCurrentThreadId());
 366
 367     ret = EnumDesktopsW( NULL, shutdown_one_desktop, (LPARAM)force );
 368
 369     SetThreadDesktop(prev_desktop);
 370
 371     return ret;
 372 }
 373
 374 /* forcibly kill all processes without any cleanup */
 375 void kill_processes( BOOL kill_desktop )
 376 {
 377     BOOL res;
 378     UINT killed;
 379     HANDLE handle, snapshot;
 380     PROCESSENTRY32W process;
 381
 382     GetWindowThreadProcessId( GetDesktopWindow(), &desktop_pid );
 383
 384     do
 385     {
 386         if (!(snapshot = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 ))) break;
 387
 388         killed = 0;
 389         process.dwSize = sizeof(process);
 390         for (res = Process32FirstW( snapshot, &process ); res; res = Process32NextW( snapshot, &process ))
 391         {
 392             if (process.th32ProcessID == GetCurrentProcessId()) continue;
 393             if (process.th32ProcessID == desktop_pid) continue;
 394             WINE_TRACE("killing process %04x %s\n",
 395                        process.th32ProcessID, wine_dbgstr_w(process.szExeFile) );
 396             if (!(handle = OpenProcess( PROCESS_TERMINATE, FALSE, process.th32ProcessID )))
 397                 continue;
 398             if (TerminateProcess( handle, 0 )) killed++;
 399             CloseHandle( handle );
 400         }
 401         CloseHandle( snapshot );
 402     } while (killed > 0);
 403
 404     if (desktop_pid && kill_desktop)  /* do this last */
 405     {
 406         if ((handle = OpenProcess( PROCESS_TERMINATE, FALSE, desktop_pid )))
 407         {
 408             TerminateProcess( handle, 0 );
 409             CloseHandle( handle );
 410         }
 411     }
 412 }